Methods and apparatus for correcting electrical noise coupling from a liquid crystal module to a plurality of sense elements disposed within a touch sensor panel, and for reducing errors in touch detection algorithms. Erroneous signal values detected by the sense elements may be corrected by utilizing a set of reference elements for detecting noise common to both the sense elements and the reference elements, and a correction module for effectively subtracting out the noise from the sensed values. Errors in touch detection algorithms may be reduced by providing a more uniform spacing between successive sense elements. In some embodiments, one or more dummy ground elements may be inserted between adjacent sense elements in order to reduce signal interference.
申请公布号
WO2010036651(A2)
申请公布日期
2010.04.01
申请号
WO2009US57853
申请日期
2009.09.22
申请人
APPLE INC.;GRUNTHANER, MARTIN, PAUL;HOTELLING, STEVEN, PORTER